HomeMy WebLinkAbout4197 Resolution - WWTP PH 2 Sole SourceRESOLUTION NO. 4197
A RESOLUTION OF THE CITY OF PASCO, WASHINGTON,
WAIVING THE COMPETITIVE BIDDING REQUIREMENTS AND
APPROVING THE PURCHASE OF CENTRISYS THK 200 CENTRIFUGE
FROM CENTRISYS FOR THE MUNICIPAL WASTEWATER TREATMENT
PLANT PHASE II PROJECT.
WHEREAS, it is critical for the City of Pasco to have the proper equipment to provide
air to the Wastewater Treatment Plant (WWTP) aeration basins for bacterial metabolism and
treatment of the wastewater; and
WHEREAS, the City has a need to purchase two Centrisys THK 200 Centrifuges as part
of the Wastewater Treatment Plant (WWTP) Phase II Improvements project; and
WHEREAS, Centrisys is currently the only vendor which has specifically constructed a
centrifuge with the purpose of thickening sludges; and
WHEREAS, other companies have adapted their dewatering centrifuges for thickening,
however, they require polymer. The Centrisys centrifuge is optimized to operate without
polymer; and
WHEREAS, other brands/manufacturers were examined, and the project Engineer
recommends the use of the Centrisys THK 200, a centrifuge specifically designed for thickening
of sludges. For this purpose, we propose the use of this equipment for thickening of waste
activation sludge (WAS) prior to anaerobic digestion; and
WHEREAS, RCW 39.04.280(2)(a) requires that prior to utilizing the sole source
exemption the City Council must first adopt a resolution reciting the factual basis supporting the
exemption; and
WHEREAS, the City Council pursuant to 39.04.280(2)(a) finds that such factual basis as
described herein and detailed in the Sole Source Worksheet, a copy of which is attached hereto
as Exhibit A, does support the application of the sole source exemption as pertaining to the
purchase of the Centrisys THK 200 centrifuge for the WWTP.
NOW, THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE
CITY OF PASCO, WASHINGTON:
That the City Council of Pasco hereby finds the above-described circumstance is
justification for the waiver of bidding requirements under the authority of RCW 35.23.352(9)
and pursuant to sole source provider (RCW 39.04.280(1)(a)) and special facilities or market
conditions (RCW 39.04.280(1)(b)) and, therefore, the bidding requirement is hereby waived for
the purchase of the Centrisys THK 200 centrifuge for the WWTP, and
Resolution - WWTP PH II Sole Source - 1
Be It Further Resolved, that the City of Pasco Public Works Department purchases two
(2) Centrisys THK 200 centrifuges for an amount not to exceed the sum of $700,000, and
Be It Further Resolved, that this Resolution shall take effect immediately.
PASSED by the City Council of the City of Pasco, Washington, this 5th day of July,
2022.
Blanche arajas
Mayor
ATTEST:
Debra Barham, CMC
City Clerk
Resolution - WWTP PH II Sole Source - 2
APPROVED AS TO FORM:
APPENDIX A
SOLE SOURCE WORKSHEET
Requisition Item: WWTP PH2: Centrisys THK 200 Centrifuge Requisition No.NA
Prior Purchase Order Number (if item had been approved previously): _NA
1. Please describe the items and its function:
The Centrisys THK 200 is a centrifuge specifically designed for thickening of sludges. For this
purpose, we propose the use of this equipment for thickening of waste activation sludge (WAS)
prior to anaerobic digestion.
2. This is a sole source because:
® Sole provider of a licensed or patented good or service
❑ Sole provider of items that are compatible with existing equipment, inventory, systems,
programs or services
❑ Sole provider of goods and services for which the City has established a standard
❑ Sole provider of goods or services that will meet the specialized needs of the City or
perform the intended function (please detail below or in an attachment)
❑ The vendor/distributor is a holder of a used item that would represent good value and is
advantageous to the City (please attach information on market price survey, availability, etc.)
3. What necessary features does this vendor provide which are not available from other vendors?
Please be specific.
Centrisys is currently the only vendor which has specifically constructed a centrifuge with the
purpose of thickening sludges. Other companies have adapted their dewatering centrifuges for
thickening however they require polymer. The Centrisys centrifuge is optimized to operate
without polymer.
The Centrisys centrifuge utilizes a Hydro -Pneumatic compressed air system to control solids
concentration. Additionally, the design of the solid bowl differs from dewatering centrifuges in
shape as it does not feature a cone at the end of the solid.
The design of the scroll system on Centrisys centrifuges is different from other manufacturers as
the main motor drives both the scroll and bowl while supplying differential speed by use of a
hydraulic drive. Other centrifuges use two separate motors connected to either the bowl or scroll
or use a gearbox to provide the differential speed.
4. What steps were taken to verify that these features are not available elsewhere?
® Other brands/manufacturers were examined (please list phone numbers and names, and explain
why these were not suitable).
1. Andritz –Denis Piche, Andritz Separation Technologies, Inc., Office: 403-995-2071
a. Manufacturer does not make a centrifuge for the purposes of thickening
2. GEA Westfalia – Perry Pelitera, GEA Wetfalia, Office: 209-895-6324
a. Manufacture markets thickening centrifuge similar to a dewatering centrifuge
b. Equipment does not use compressed air to control solids output
c. Equipment does not use a hydraulic back drive for differential scroll speed
d. Equipment requires polymer
3. Flottwegg – Ryan Spanton, Goble Sampson, Office: 801-268-8790
a. Manufacture markets thickening centrifuge similar to a dewatering centrifuge
b. Equipment does not use compressed air to control solids output
c. Equipment does not use a hydraulic back drive for differential scroll speed
❑ Other vendors were contacted (please list phone numbers and names, and explain why these
were not suitable).
5. Sole source vendor certifies that the City is getting the lowest price offered for the item.
a Project Cost: $341,100 per unit, two units will be in the project.
Certification of Need
This recommendation for sole source is based upon on objective review of the product/service required
and appears to be in the best interest of the City. I know of no conflict of interest on my part of personal
involvement in any way with this request. No gratuities, favors or comprising actions have been taken.
Neither has er �fam �to
i h particular brands, types or equipment, materials or firm been a
decidinginfl source this purchase.
Date:Z
Approved By: vel/ Date: 7 / 35 Zc�ZZ
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Dave Zabell, Uk, Mau4er
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